61330779502783 has 4 divisors (see below), whose sum is σ = 70092319431760. Its totient is φ = 52569239573808.

The previous prime is 61330779502703. The next prime is 61330779502801. The reversal of 61330779502783 is 38720597703316.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61330779502783 - 2⁴¹ = 59131756247231 is a prime.

It is a super-2 number, since 2×61330779502783² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61330779502703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4380769964478 + ... + 4380769964491.

It is an arithmetic number, because the mean of its divisors is an integer number (17523079857940).

Almost surely, 2^{61330779502783} is an apocalyptic number.

61330779502783 is a deficient number, since it is larger than the sum of its proper divisors (8761539928977).

61330779502783 is an equidigital number, since it uses as much as digits as its factorization.

61330779502783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8761539928976.

The product of its (nonzero) digits is 40007520, while the sum is 61.

The spelling of 61330779502783 in words is "sixty-one trillion, three hundred thirty billion, seven hundred seventy-nine million, five hundred two thousand, seven hundred eighty-three".